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Publication numberUS1243433 A
Publication typeGrant
Publication dateOct 16, 1917
Filing dateAug 30, 1915
Priority dateAug 30, 1915
Publication numberUS 1243433 A, US 1243433A, US-A-1243433, US1243433 A, US1243433A
InventorsWilliam A Lurie
Original AssigneeWilliam A Lurie
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1243433 A
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Description  (OCR text may contain errors)



1,243,433. Patented (ma. 16,1917.

2 SHEETS-SHEET I- M $71655 Inward/ 07" w. A. LURIE.

DOOR LOCK. APPLICATION FILED AUG-30. 1915- Patented Oct. 16, 1917.

2 SHEETSSHEET 2- Illlll wanna A. than}, or amino, ILLINOIS.


Specification of Letters Patent.

Patented Oct. 16, 1917.

Application filed August 30, 1915. Serial No. 47,969.

To all whom it may concern:

Be it knownxthat- LIVILLIAM A. LURIE, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain: new and useful Improvements in Door- Locks, of which the following is a specification.

My invention relates to locks and its object is to provide im'proved'means for controlling the opening of the look from a distance. I a

The features of my invention will be clearly understood by reference to the accompanying draii 'ings in which w Figure lis a plan, View .of the door and jamb lock sections with the top housing plates removed;

. Fig. 2 isfa sectional "View on plane 22, Fig. 1, i

Fig. 3 is a-similar sectional, view of the door lockapart showing the bolt in its inner position,

1 Fig. 4 is a sectional'view on planet-Ct, Fig.2,

Fig. 5 1s a sectional view on plane 5-5.

. Fig. 2,

r Fig. 6 is a sectional View on plane 6-6, Fig. l, and

Fig. 7 is asectional view on plane 77, Fig 1. v The door lock part comprises the rectangular housing box 10' for which'the-coverll is provided' Through the side wallsjof the housing the usual inlet openings. are provided for the knob stems. 'Between these openings t he,inner,-and, outer ,knob stem levers Band 13 are disposed. these being of. the ordinary eonstruction,-the arrange- ;ment being for a divided knob stem whose inner section turns only. the inner lever structure 12 and whose outer section turns only the outer lever. structure 13. The.op erating lever 14: is pivoted atits lower end "on the pin lf its tip 16 cooperating with the; bolt mechanism, as will be explained later. A spring 17* pressing on the foot 18 of the lever 14: tendsto hold ..the lever.

against its stop 19. Turning ofeither' knob section in either direction will swing the lever 14 to controlgthe boltmechanism.

:f Describing now the bolt jmecha'nism, the bolt body 20 has the head 21 with the rounded entrance surface :22. The belt is guided by the sides of the opening 23 in the escutche'on ;plate 24, and pins 25, extending from the-upper and lower, sides-ofthe head limit the outward movement of the bolt. lVithin thechamber 26 formed in the bolt head and body is the detent pawl 27 pivoted at its inner end onthe pin 28 extend .ing through the body sides.

The outer end of the pawl has the forwardly extending detent, projection 29 and the rear cam extension 30. At its inner end it has the rearwardly extending arm 31. Extending into the chamber 26 behind the pawl is the releasing and locking bar 32 having the notch 33 in its front side for receiving the pawl arm3l and, providing the abutment shoulders3i andv35 for engaging with this arm. The outer end of the bar 32 is rounded to provide the camsurface 36 for cooperating Surrounding the outer end of the bar is a compression sprlng 39 whlch abuts against the collar 40 on the bar and the inner side 'tl of a box-like frame 42 which receives the barvand the rear end of the bolt body. The bar at its-outerend extends through the opening 43 in the wall el'and has secured thereto a plate 44, preferably screwthreadedrthereon for purposes of. adjustment.

,' Describing now the operation of the bolt mechanism, the end 16 of the lever M engages with the abutment plate H. In Fig.

2 the .bolt is shown out the inner end of the bar 32 being above the cam end 30 of the pawl .to hold the detent end 29 in front of the es'cutcheon plate to thus lock the bolt .in its outer position. Upon turning of either doorknob the bar willbe shifted inwardly independently of the bolt body. Immediately-upon such movement of the bar its front end will be drawn away from the pawl end, and then the shoulder 33 will engage, with thearm 3l'of the pawha ndthe -;pawl willbe drawninto the chamber 26*to -the position shown in Fig. 3. J shoulder-.31 on3the bar will engage Witllwtlle projection 38 on the boltbodv and the bolt itself will move inwardly. 'The frame 42 will be prevented from moving inwardly by thewstop post 46 and during inward move- From; the front wall of the frame '42 extends a tongue 45 for cooperating with the front side of pawl 27 to lock the pawl "inkits position entirely within the chain- "ber 26..

Then the ment of the bolt the front edge of the pawl will glide over the tongue 45 which will assist in shifting the pawl to its inner position, and then when the bolt is fully in the tongue will be in front of the pawl and will lock it in its position entirely within the chamber :26. When thedoor knob is now released the spring 39 will push-the bolt structure outwardly until the bolt head is in its outermost position with its stop pins 25 engaging the escutcheon plate 24. The pawl is then free of the tongue 45 but still held in the chamber 26 by the shoulder33 on the bar. hen the bolt body stops the bar continues moving outwardly, its shoulder 33 releasing the pawl end 31 and its rounded front end 36 pushes against the cam end 30 of the pawl and the pawl is forcibly swung out of the chamber 26 to carry its'detent end 29 into detent engagement with the front of the escutcheon plate. The shoulder 35 eventually reaches the pawl extension 31 and assures full outward movement of the pawl and the outer end of the bar is then behind the pawl end 30 and assists in holding the pawl out. The belt is now locked in its outer position until the knob is turned or key 'mechanism, not shown, is actuated, an opening 47 being provided in the housing for the reception of suitable key mechanism The jamb mechanism for receiving the bolt head is arranged within a housing 48 which has the escutcheon plate 49. Extending into the housing from the escutcheon plate are two arms 50 and 51 for journaling a shaft 52 on which is secured a pawl cylinder 53 having a number of pawl extensions 54. One end of the shaft carries a block'55 which has as many sides as there are pawl extensions, and a spring 56 acting on this block serves to prevent accidental rotation of the pawl cylinder and to always hold the cylinder with one of its pawl arms extending outwardly, so that the rounded pawl back 57 will be in position to be engaged by the rounded surface 22 of the bolt, the escutcheon plate 49 being provided with an entrance opening 58 for the bolt. With this arrangement when the door is slammed or closed without turning of a knob or key the projecting bolt head will strike the back of the projecting pawl arm and will rotate the pawlcylinder until the spring 56aengages the next fiat surface of the block 55, the next pawl arm being then brought to outer position to be:in front of the bolt head. .Tn

order to prevent reverse movement of'the pawl'cylinder so that the bolt will remain on'the post 60. "thislever being adapted to swing in the direction of'the pawl cylinder axis'and engaged by a spring 61 which tends to swingitto bring its end against the back of one of the pawl arms when the pawl cylinder has been shifted into detent position with reference to the bolt. When the door is closed and the bolt engages the PIOjBCtQd armof the pawl cylinder, the front of the pawl in advance of the detent lever 59 will engage at its end with the rounded surface 62 of the lever and the lever will be caninied away from the pawl to allow turning thereof. But after. the door is closed and the bolt is behind the then projected pawl arm the detent lever will again be in detent position behind another pawl arm and'the bolt will be blocked and the door locked in closed position.

In order that the door may now be opened 1 a may be connected to be controlled by a suitable switch located where desired. When the circuit is closed the armature extension 65 isattracted and the detent-lever released from the pawl cylinder so that the "door is free to be open, and in practice the door will have spring hinges or be otherwise controlled to open a distance after suchrelease.

The usual means may be provided'for locking the outer door knob section against turning. Such mechanism is shown in Fig. 1. A reciprocating bar 79 is guided bythe passage of its button end 80thr'ough the escutcheon plate and engages at its inner end in the guide slot 81. Below this bar is another'bar 82 having the push button end 83 and these bars are connected by a lever '84 pivoted centrally to a pin 85, so that when the button 80 is pressed the bar 79 will move inwardly and when the button 83 is pressed this bar will be shifted outwardly. The door knob lever structure 13 has the slot 86 for receiving the inner end of bar 7 9 when this bar has been shifted inwardly, and durthe absence of trigger mechanism, it will be impossible to shift the bolt inwardly by-prying betweenthe' door and jamb from the outside. It will also be impossible torea'ch the interior of the jamb mechanism from the outside'to tamper with the pawl cylinder- -mechanism. My improved locking ,me'cha:

nism is therefore burglar-proof and unless one has a suitable key entrance can; bejhad only by breaking the door or jamb. I

' I do not of course desire to be limited to the exact construction, arrangement and op eration shown and described as there may be modifications which would still come within the scope of the appended claim.

I claim as follows:

In locking mechanism of the class described, the combination of a door lock part having a bolt adapted to be locked in its outer position, a pawl cylinder having pawl arms adapted to extend into the path of said bolt, a shaft to which said pawl cylinder is secured, a polygonal block secured to the shaft end, a fiat spring engaging with said block and tending to prevent rotation thereof and of the shaft and cylinder, a cletent arm pivoted at an intermediate point and adapted to swing in a direction lengthwise of said cylinder, a spring tending to hold one end of said detent arm back of one pawl arm and above the next pawl arm whereby to lock the cylinder against movement which would release the bolt, the side of the detent arm engaging with said next pawl arm being beveled to permit outward swing of the arm when the cylinder is r0- tated by the bolt when the door is closed, the other end of said detent arm forming an armature, and an electro-magnet adjacent said armature end adapted when energized to attract said end to rotate the detent arm to re lease its other end from the pawl cylinder to permit rotation thereof and opening of the door.

In witness whereof I have hereunto set my hand this 26th day of August, A. D. 1915.




Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eateuts, Washington, D. G.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2836050 *Nov 16, 1953May 27, 1958Gen Motors CorpAutomobile door latch
US3354677 *Jun 1, 1965Nov 28, 1967Green Clark LDoor control system
US4529234 *Sep 29, 1982Jul 16, 1985Architectural Control Systems IncorporatedElectrical operating means for door lock mechanisms
US7770949 *Oct 24, 2007Aug 10, 2010The Boeing CompanyReduced door opening force and enhanced security flight deck door mechanism
U.S. Classification292/341.16, 292/280
International ClassificationE05B47/04
Cooperative ClassificationE05B47/0047